NASHVILLE, Tenn. -- The Nationals improved their bullpen on Wednesday by agreeing to terms with right-hander Shawn Kelley, pending a physical, while working on signing right-hander Yusmeiro Petit, according to a baseball source. The club has not yet confirmed.According to the source, Kelley, who is expected to pitch in the late innings for Washington, will likely take a physical later this week. Kelley had his best year of his career in 2015, playing in 53 games with a 2.45 ERA for the Padres. 
If the Nationals sign Petit, who was non-tendered by the Giants recently, he will most likely be a long man out of the bullpen for Washington. He is best known in Washington for pitching six shutout innings out of the bullpen in Game 2 of the 2014 National League Division Series against the Nationals, who lost the game in 18 innings.The Nationals are looking to revamp their bullpen after it struggled in the second half of '15. They are also still looking to trade arms at the the back-end of the bullpen -- Jonathan Papelbon and Drew Storen.
Bill Ladson/ MLB.com
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